Suction cup base



FIG. 1 is a top perspective view of a suction cup base, showing my new design;

FIG. 2 is a front plan view, which is identical to a rear plan view, a left plan view, and a right plan view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines in FIG. 4 illustrate portions of the suction cup base that form no part of the claimed design. 

CLAIM I claim the ornamental design for a suction cup base, as shown and described. 